Witalis Pellowski

Competitive transport of toxic metal ions by polymer inclusion membranes

The paper gives a short overview of application of polymer inclusion membranes (PIMs) for separation and removal of metal ions. Investigation of the selective removal of toxic metal ions, i.e. Cr(VI), Cd(II), Zn(II) from acidic chloride aqueous solutions, as well as trace radionuclides, i.e., 137Cs, 90Sr and 60Co from wastewaters using transport across polymer inclusion membranes was studied. The carriers, i.e., tri-n-octylamine for anionic metal species, as well as dibenzo-21-crown-7, tertbutyl-dibenzo-21-crown-7, and dinonylnaphtalenesulfonic acid for metal cations were incorporated into polymer inclusion membranes composed of cellulose triacetate as a support and o-nitrophenyl pentyl ether as a plasticizer. Selective transport of chromium(VI) over zinc(II) and cadmium(II) chloride complexes through PIMs was observed. Competitive transport of trace radionuclide ions, i.e., 137Cs, 90Sr, and 60Co from NaNO3 aqueous solutions across polymer inclusion membranes containing a mixture of dinonylnaphtalenesulfonic acid, and dibenzo-21-crown-7 as the carrier provide the selectivity order Cs(I)>Sr(II)>Co(II).

Selected Aspects of Cbrn Protection in Military Peace Support Operations

Abstract This paper presents the results of studies based on the analysis of field exercises organized for the purpose of disinfection of preventive sub-units regrouping from the areas threatened with endemic infectious diseases. The research also concerns the analysis of the possibility of conducting the liquidation of contamination in the conditions of access to the local infrastructure with the use of chemical weapons equipment and cooperation with the non-military system: police, fire brigade, emergency medical services and municipal guards. The method of preparation of the ozone chamber in field conditions is also presented

Color Centers in Doped Bi12GeO20 Crystals Irradiated by Gamma Quanta with High Dose

The present work is devoted to investigation of optical absorption in doped Bi 12 GeO 20 (BGO) single crystals in the spectral range 0.2… 1.1 μm induced under influence of gamma quanta with energy 0,661 MeV and dose 2 × 10 3 Gy. For comparison the changes of absorption spectra during irradiation by light from halogen a lamp source are studied.